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William I of Namur

William I, also known as the Rich, was a member of the House of Namur who became Marquis of Namur in 1337 upon his father's death. He was the fifth-born son of John I, Marquis of Namur and Maria d'Artois.

Born into a prominent noble family, William's early life is not well-documented. However, it is known that he had several siblings who died without children, making him eligible to succeed his father as Marquis of Namur. Following in the footsteps of his predecessors, William expanded the Namur territories through strategic land purchases.

In 1362, Charles IV, Holy Roman Emperor, declared Namur a direct fiefdom of the Empire, effectively ending its status as a vassal state of the County of Hainaut. This marked an important turning point in the history of Namur, solidifying its position within the complex web of European politics.

William's personal life was also subject to significant changes during his lifetime. His first wife, Jeanne, died in 1349 due to the Black Death, leaving him without children from their marriage. In 1352, he married Catherine de Savoie, daughter of Louis II of Vaud and Isabelle de Châlon.

As Marquis of Namur, William played a significant role in European politics during the late 14th century. He participated in various tournaments and military campaigns, including one against the idolatrous peoples of Prussia, although he did not ultimately participate due to his own death during the journey in April 1335. His brother, John II, had also died on this expedition.

Following William's death in 1391, his brother Philip succeeded him as Marquis of Namur. However, due to a lack of legitimate heirs, Guido II was appointed by Philip through an express will, and later Henry, the fourth-born sibling, took over after Guido's untimely death from wounds sustained during a tournament in March 1336.

William I's legacy extends beyond his own family, as he played a crucial role in shaping the history of Namur and its relationships with neighboring territories. His diplomatic efforts, including attempts to forge alliances with powerful figures such as Magnus IV Eriksson, demonstrate the complexities of medieval politics and the importance of strategic marriages and alliances for securing power and influence.

Despite limited information available on William's personal life, his impact on the history